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प्रश्न
Use your brain power!
How is the air that we inhale purified in our body?
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उत्तर
There are tiny, fine hair-like outgrowths called cilia inside the nose from where the air passes inside. Larger dust particles get caught in these hairs. The air going inside the trachea thus gets filtered. There is also a layer of a sticky substance called mucous. The dust and smoke particles stick to the mucous. Thus, the air that we inhale gets purified before it reaches the lungs.
संबंधित प्रश्न
Haemoglobin is present in ______ cells.
The diagram below represents the simplified pathway of the circulation of blood. Study the same and answer the questions which follow:
(i) Name the blood vessels labelled 1 and 2.
(ii) State the function of blood vessels labelled 5 and 8.
(iii) What is the importance of the blood vessel labelled 6?
(iv) Which blood vessel will contain a high amount of glucose and amino acids after a meal?
(v) Draw a diagram of the different blood cells as seen in a smear of human blood.
Explain the following:
Why is the closed circulatory system more efficient than the open system?
Fill in the blanks with suitable words given below:
The blood loaded with carbon dioxide from the body comes into the ______ of the heart.
True or false:
The four blood groups in human beings are A, B, AB and AO
Find the odd one out, giving reason.
Complete the following sentence with appropriate word:
The membranous covering of the heart is _______.
State the Location: Spleen
Long answer question:
Describe human blood and give its functions.
Which of the following is TRUE regarding leucocytosis?
